TABLE 4.
Extracellular enzyme activities of A. vadensis and A. niger during growth on polymeric carbon sourcesa
| Strain and carbon source | Activity of enzyme (nmol of p-nitrophenol released/min/mg of extracellular protein)b
|
|||||
|---|---|---|---|---|---|---|
| ABF | AGL | LAC | BGL | MND | BXL | |
| AN lax | 59.9 ± 2.4 | 318.8 ± 7.4 | 310.2 ± 17.7 | 492.3 ± 2.6 | 49.9 ± 0.3 | 453.5 ± 15.5 |
| AV lax | 8.2 ± 1.0 | 77.6 ± 6.9 | 14.5 ± 4.5 | 396.0 ± 11.9 | 6.3 ± 0.5 | 63.4 ± 8.7 |
| AN awb | 7.5 ± 0.8 | 14.0 ± 0.1 | 9.0 ± 0.3 | 47.9 ± 6.7 | 13.2 ± 1.7 | 12.6 ± 1.5 |
| AV awb | 6.4 ± 0.2 | 7.3 ± 0.7 | 7.7 ± 0.2 | 34.0 ± 2.8 | 7.1 ± 0.5 | 18.2 ± 1.9 |
| AN gg | 9.8 ± 0.4 | 253.7 ± 1.3 | 148.2 ± 1.6 | 240.1 ± 5.1 | 132.3 ± 6.3 | 68.7 ± 2.8 |
| AV gg | ND | 53.0 ± 5.8 | 10.3 ± 0.5 | 225.0 ± 7.6 | 48.7 ± 4.8 | 5.6 ± 0.6 |
| AN cell | ND | 48.2 ± 3.3 | ND | 35.1 ± 3.9 | ND | 3.9 ± 0.4 |
| AV cell | ND | ND | ND | 26.0 ± 2.9 | ND | ND |
| AN bwx | 55.4 ± 3.5 | 507.2 ± 12.1 | 149.4 ± 4.2 | 331.0 ± 15.8 | 6.1 ± 0.3 | 441.2 ± 28.4 |
| AV bwx | 39.2 ± 2.8 | 140.0 ± 6.3 | 1.6 ± 0.2 | 238.8 ± 1.9 | 0.7 ± 0.2 | 289.0 ± 13.7 |
a
AN, A. niger N402; AV, A. vadensis CBS 113365; lax, crude xylan preparation; awb, alder wood bark; gg, guar gum; cell, cellulose; bwx, birchwood xylan; ABF, α-arabinofuranosidase; AGL, α-galactosidase; LAC, β-galactosidase; BGL, β-glucosidase; MND, β-mannosidase; BXL, β-xylosidase.
b
Data are means ± standard deviations. ND, not detected.